SPRZ491D december 2020 – june 2023 DRA821U , DRA821U-Q1
MSMC: Incorrect Parity Detect on bytecount
A signal connection to check the parity of of byte enables for transactions coming from the navigator sub-system to the MSMC is incorrect, this causes false indications of a party error at the boundary of MSMC and throughout the path to DDR. To avoid these false error indications, the entire ECC aggregator must be disabled, which also disables detection of many other (potentially valid) errors and a loss of safety coverage.
The COMPUTE_CLUSTER0_MSMC_ECC_AGGR0 must be disabled. There is no direct way to reproduce the diagnostic coverage provided by these mechanisms. High-level system diagnostics may be implemented to mitigate the loss of coverage, but this will be application specific.